What colour primer ?
 

My car is white, was going to use white primer,but as someone pointed out, having a white base might obscure places that need spraying,so should i use grey,will grey make the ewhite finish different shade etc if i use white or not ??

I would go for white and just take your time :)

Personally I would go for grey, the paint will still cover it and it will be fine. Remember that 90% of cars use a grey primer and you cant see a difference in shade.

Go for grey and then you are sure you havnt missed any. Its grey for a reason!

go for grey as white on white u r bound to miss an area, grey will bring out the same finish as the white

go for grey will make no difference in the finnish mate :)

Cheers guys.
i have decided to leave it as it is, in the fibreglass/primed state i received it in because im having doors sprayeed etc they might as well prime the scoop also, as the primer u get from halfords etc isnt reeally any good for putting item into the oven to harden.